Here's another possible design for the ship, and this one might be most appropriate, since my online friend, who created both the character Luna, and the Pieces itself, said the ship was a decommissioned luxury space liner, sorta like the Queen Elizabeth 2 in space, and use for the bounty hunters' home and missions.

Though I wonder what sort of weaponry this thing could have, and where would they be located.

That luxury cruiser is looking very good. Therefore, I suggest to work a bit more over the pylons (add more details and make it less boxxy) and naceles (make it a little longer, change the naceles and a bit of details).
I feel the missing of the nav lights too.

The ship can break apart into 3 pieces, if needed. Each piece is self-contained with warp pods and sublight. The ventral one between the 2 cargo tanks is often inert, just used for extra energy, especially since this one only has phasers.

Click to expand...

Now the best part of this is that the central nacelle is protected from incoming fire from most all directions.